bool IsSupportPhone()
{
    const DWORD    TAPI_API_LOW_VERSION = 0x00020000;
    const DWORD    TAPI_API_HIGH_VERSION = 0x00020000;

    bool    bResult = false;

    HRESULT  hr = E_FAIL;
    LRESULT  lResult = 0;
    HLINEAPP hLineApp;
    DWORD    dwNumDevs;  //number of line devices
    DWORD    dwAPIVersion = TAPI_API_HIGH_VERSION;
    LINEINITIALIZEEXPARAMS liep;

    DWORD dwTAPILineDeviceID;
    const DWORD dwAddressID = 0;

    liep.dwTotalSize = sizeof(liep);
    liep.dwOptions   = LINEINITIALIZEEXOPTION_USEEVENT;

    if(SUCCEEDED(lineInitializeEx(&hLineApp, 0, 0, TEXT("ExTapi_Lib"), &dwNumDevs, &dwAPIVersion, &liep)))
    {
        BYTE* pCapBuf = NULL;
        DWORD dwCapBufSize = 512;
        LINEEXTENSIONID  LineExtensionID;
        LINEDEVCAPS*     pLineDevCaps = NULL;

        pCapBuf = new BYTE[dwCapBufSize];

        pLineDevCaps = (LINEDEVCAPS*)pCapBuf;
        pLineDevCaps->dwTotalSize = dwCapBufSize;

        // Get TSP Line Device ID
        dwTAPILineDeviceID = 0xffffffff;

        for (DWORD dwCurrentDevID = 0 ; dwCurrentDevID < dwNumDevs ; dwCurrentDevID++)
        {
            //ensure TAPI, service provider, and application are all using the same versions
            if (0 == lineNegotiateAPIVersion(hLineApp, dwCurrentDevID, TAPI_API_LOW_VERSION, TAPI_API_HIGH_VERSION,
                &dwAPIVersion, &LineExtensionID))
            {
                lResult = lineGetDevCaps(hLineApp, dwCurrentDevID, dwAPIVersion, 0, pLineDevCaps);

                //increase buffer size if too small to hold the device capabilities
                if (dwCapBufSize < pLineDevCaps->dwNeededSize)
                {
                    delete[] pCapBuf;
                    dwCapBufSize = pLineDevCaps->dwNeededSize;
                    pCapBuf = new BYTE[dwCapBufSize];

                    pLineDevCaps = (LINEDEVCAPS*)pCapBuf;
                    pLineDevCaps->dwTotalSize = dwCapBufSize;

                    lResult = lineGetDevCaps(hLineApp, dwCurrentDevID, dwAPIVersion, 0, pLineDevCaps);
                }
                //lResult of 0 means the device capabilities were successfully returned
                if ((0 == lResult) &&
                    (0 == _tcscmp((TCHAR*)((BYTE*)pLineDevCaps+pLineDevCaps->dwLineNameOffset), CELLTSP_LINENAME_STRING)))
                {
                    dwTAPILineDeviceID = dwCurrentDevID;
                    bResult = true;
                    break;
                }
            }
        }

        delete [] pCapBuf;
    }

    lineShutdown(hLineApp);

    return bResult;
}